3500 rpm redline

i have a 89 civic dx wagon just recently converted 2 mpfi.the wiring harness was built right and im running a 91 ex computer but for some reason when its running
it has a 3500 rpm rev limit and its throwing a crank position sennsor code even tho its hooked up ,has anyone else had this problem

Alright Mate ,
Did you get the ECU out of an AUTOMATIC car by anychance ?
My Mate and i figured out that his was redlining really low with an automatic ECU for some reason we then swapped it for a manual Ecu then it worked fine ?

Alright Mate ,
Did you get the ECU out of an AUTOMATIC car by anychance ?
My Mate and i figured out that his was redlining really low with an automatic ECU for some reason we then swapped it for a manual Ecu then it worked fine ?

Try it if you can source one . It worked for us .

Good luck my friend.

Click to expand...

there is a jumper wire inside the ECU from automatic to manual.
all you had to do was take off the cover and look up the scamatic and solder the wire off and onto the other board.

Alright Mate ,
Did you get the ECU out of an AUTOMATIC car by anychance ?
My Mate and i figured out that his was redlining really low with an automatic ECU for some reason we then swapped it for a manual Ecu then it worked fine ?

there is a jumper wire inside the ECU from automatic to manual.
all you had to do was take off the cover and look up the scamatic and solder the wire off and onto the other board.

Click to expand...

I agree with both of these guys. I had the same problem when I got my P28. The solder wasn't very clean, so to speak, so after it got re-done, voila! Hello five speed converted P28 with no problems. It used to get stuck at 4,000rpm, by the way.